---
title: "Guarantees of Origin (GO) — Class A Atlas glossary"
description: "European equivalent of US RECs."
canonical: https://classa.info/glossary/guarantees-of-origin
pageType: glossary
lastUpdated: 2026-04-01T00:00:00.000Z
license: "CC BY 4.0 with attribution to Class A Atlas (https://classa.info)."
---

> European equivalent of US RECs.

## TL;DR

- European equivalent of US RECs.
- Tradable certificates issued under EU Renewable Energy Directive proving that 1 MWh of energy was produced from a renewable source.

# Guarantees of Origin (GO)

*ESG · EU*

## Short definition

European equivalent of US RECs.

## Full definition

Tradable certificates issued under EU Renewable Energy Directive proving that 1 MWh of energy was produced from a renewable source. Required to substantiate any 'green electricity' claim under CSRD/ESRS.

## Why this matters for Class A leasing

Guarantees of Origin (GO) is part of the esg vocabulary that institutional [Class A](/glossary/class-a) occupiers, landlords, and advisers use across EU markets. Understanding it correctly affects how you read lease documents, model occupancy economics, and benchmark deal terms across cities. Class A Atlas tracks the EU definition alongside the global standard so [cross-border](/topics/cross-border-expansion) occupiers can translate quickly.

## Related topics

- [**ESG / LEED for Tenants**](/topics/esg-leed-tenants) — How tenants evaluate, negotiate, and report on ESG performance in a Class A office lease.

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Citation: Source: Class A Atlas (https://classa.info/glossary/guarantees-of-origin), updated 2026-04-01T00:00:00.000Z.